The fourth grade math problems are calculated orally.

1.45+ 15×6= 135

2.250÷5×8=400

3.6×5÷2×4=60

4.30×3+8=98

5.400÷4+20×5= 200

6. 10+ 12÷3+20=34

7.(80÷20+80)÷4=2 1

8.70+( 100- 10×5)= 120

9.360÷40= 9

10.40×20= 800

1 1.80-25= 55

12.70+45= 1 15

13.90×2= 180

14. 16×6= 96

15.300×6= 1800

16.540÷9=60

17.30×20= 600

18.400÷4= 100

19.350-80= 270

20. 160+70=230

2 1. 18-64÷8= 10

22.42÷6+20=27

23.40-5×7= 5

24.80+60÷3= 100

25.4 1+ 18÷2= 50

26.75- 1 1×5= 20

27.42+7-29= 20

28.5600÷80=70

29.25× 16= 400

30. 120×25= 3000

3 1.36× 1 1= 396

32. 1025÷25=4 1

33.336+70= 406

34.25×9×4= 900

35.200-33×3= 10 1

36.3020- 10 10=20 10

37. 12×50= 600

38.25×8= 200

39.23× 1 1= 253

40. 125÷25=5

4 1.4200-2200=2000

42.220+80= 300

43.20×8×5= 800

44.600-3×200=0

45.20+20÷2= 30

46.35-25÷5= 30

47.36+8-40= 4

48.2800÷40=70

49.98÷ 14 = 7

50.96÷24 = 4

5 1.56÷ 14 =4

52.65÷ 13 = 5

53.75÷ 15 = 5

54. 120÷24 =5

55.200÷25 = 8

56.800÷ 16 = 50

57.840÷2 1 =40

58.560÷ 14 = 40

59.390÷ 13 = 30

60.600÷ 15 =40

6 1.72÷24 = 3

62.85÷ 17 = 5

63.90÷ 15 =6

64.96÷ 16 = 6

65.78÷26 = 4

66.5 1÷ 17 =3

67.80÷40 = 2

68. 100÷20 = 5

69. 100÷4 =25

70.240÷40 = 6

7 1.920÷4 = 230

72.300÷60=5

73.64÷2 = 32

74.64÷4 = 16

75.50÷5 = 10

76.60÷8 = 7.5

77.96÷4 = 24

78.90÷6 = 15

79.400+80 = 480

80.400-80 = 320

8 1.40×80 =3200

82.400÷80 = 5

83.48÷ 16 = 3

84.96÷24 =4

85. 160×5= 800

86.4×250= 1000

87.0×5 18= 0

88. 10×76= 760

89.36× 10=360

90. 15×6= 90

9 1.24×3= 72

92.5× 18= 90

93.26×4= 74

94.7× 15= 105

95.32×30= 960

96.40× 15= 600

97.60× 12= 720

98.23×30= 690

99.30×50= 1500

100.5×700=3500

25 - 15 -80 = 10 -80 = -70

26 -6 -64 = 20 -64 = -44

27 + 3 -48 = 30 -48 = - 18

28 + 12 -32 = 40 -32 = 8

29 + 2 1 - 16 = 50 - 16 = 34

30 + 30 + 0 = 60 + 0 = 60

3 1 + 39 + 16 = 70 + 16 = 86

32 + 48 + 32 = 80 + 32 = 1 12

33 + 57 + 48 = 90 + 48 = 138

34 + 66 + 64 = 100 + 64 = 164

35 + 75 + 80 = 1 10 + 80 = 190

36 + 84 + 96 = 120 + 96 = 2 16

37 + 93 + 1 12 = 130 + 1 12 = 242

38 + 102 + 128 = 140 + 128 = 268

39 + 1 1 1 + 144 = 150 + 144 = 294

40 -30 - 140 = 10 - 140 = - 130

4 1 -2 1 - 124 = 20 - 124 = - 104

42 - 12 - 108 = 30 - 108 = -78

43 -3 -92 = 40 -92 = -52

44 + 6 -76 = 50 -76 = -26

45 + 15 -60 = 60 -60 = 0

46 + 24 -44 = 70 -44 = 26

47 + 33 -28 = 80 -28 = 52

48 + 42 - 12 = 90 - 12 = 78

49 + 5 1 + 4 = 100 + 4 = 104

50 + 60 + 20 = 1 10 + 20 = 130

5 1 + 69 + 36 = 120 + 36 = 156

52 + 78 + 52 = 130 + 52 = 182

53 + 87 + 68 = 140 + 68 = 208

54 + 96 + 84 = 150 + 84 = 234

55 -45 -200 = 10 -200 = - 190

56 -36 - 184 = 20 - 184 = - 164

57 -27 - 168 = 30 - 168 = - 138

58 - 18 - 152 = 40 - 152 = - 1 12

59 -9 - 136 = 50 - 136 = -86

60 + 0 - 120 = 60 - 120 = -60

6 1 + 9 - 104 = 70 - 104 = -34

62 + 18 -88 = 80 -88 = -8

63 + 27 -72 = 90 -72 = 18

64 + 36 -56 = 100 -56 = 44

65 + 45 -40 = 1 10 -40 = 70

66 + 54 -24 = 120 -24 = 96

67 + 63 -8 = 130 -8 = 122

68 + 72 + 8 = 140 + 8 = 148

69 + 8 1 + 24 = 150 + 24 = 174

70 -60 -260 = 10 -260 = -250

7 1 -5 1 -244 = 20 -244 = -224

72 -42 -228 = 30 -228 = - 198

73 -33 -2 12 = 40 -2 12 = - 172

74 -24 - 196 = 50 - 196 = - 146

7+ 14=2 1 ... 18-9=9 ...

8+ 16=24 ...25-5=20 ...

9+ 18=27...56-45= 1 1 ...

10+20=30...45-23=22 ...

1 1+22=33...78-23=55 ...

12+24=36 ...

10-3=7

15-4= 1 1

20-5= 15

25-6= 19

30-7=23

35-8=27

40-9=3 1

45- 10=35

50- 1 1=39

55- 12=43

60- 13=47

65- 14=5 1

70- 15=55

75- 16=59

80- 17=63

85- 18=67

90- 19=7 1

95-20=75

100-2 1=79

105-22=83

1 10-23=87

1 15-24=9 1

120-25=95

125-26=99

130-27= 103

13+26=39 ...

14+28=42 ...

15+30=45 ...

16+32=48 ...

17+34=5 1 ...

18+36=54 ...

19+38=57 ...

20+40=60 ...

2 1+42=63 ...

22+44=66 ...

23+46=69 ...

24+48=72 ...

25+50=75 ...

26+52=78 ...

27+54=8 1 ...

28+56=84 ...

29+58=87 ...

30+60=90 ...

3 1+62=93 ...

32+64=96 ...

33+66=99 ...

5 ÷ 1 =5

10 ÷2 =5

15 ÷3 =5

20 ÷4 =5

25 ÷5 =5

30 ÷6 =5

35 ÷7 =5

40 ÷8 =5

45 ÷9 =5

50 ÷ 10 =5

55 ÷ 1 1 =5

60 ÷ 12 =5

65 ÷ 13 =5

70 ÷ 14 =5

75 ÷ 15 =5

80 ÷ 16= 5

85 ÷ 17= 5

90 ÷ 18= 5

95 ÷ 19= 5

100 ÷20 =5