First, calculate.

2+54= 38-20= 50+26= 84+4=

4+43= 49-7= 60+6= 23+50=

19+40= 13+30= 88-4= 58+7=

57-6= 6+57= 36+20= 65-30=

49+6= 95-60= 5+38= 4+56=

Second, use vertical calculation.

28+4 1= 65+25= 79-55= 80-6 1=

73+ 17-38= 94-60- 15= 70-35+28= 42+ 18+ 12=

3. fill in ">", "

54+20○74 40+25○70 32+6○6+32

35+4 ○40 7+20 ○ 100 34+40○43+30

Fourth, fill in the form.

1, add 7 continuously, and write the sum of each addition.

7 14 ( )、( )、( )、42、( )、( )、( )、70

2. Subtract 7 from 50 continuously, and write down the difference each time.

50、( )、( )、( )、( )、( )、( )、 1

3、★★★★★★★★★★★★ ☆☆☆☆☆☆

★ More than ☆, ☆ less than ★. □□□□□□ =□ (piece)

Second, even a company.

Score greater than 50, score less than 50.

43+6 60-7

92-40 49+3

76-30

37+8 56-8

54-9

Fifth, solve the problem.

1, pulled out 50 radishes and 20 radishes. How many radishes did two rabbits pull out? □□□□□□ =□ (piece)

There are 90 story books in the small library, and 40 have been lent out. How many books are left? □□□□□□ =□ (Ben)

3. There are 48 people in the school choir, including 20 men and how many women? □□□□□□ =□ (person)

Step 4 buy toys.

42 yuan 40 yuan 28 yuan 30 yuan

(1) Xiaoming buys one and gets one free. How much is a * *? □□□□□□ =□ (yuan)

(2) Xiaoli bought a toy from 50 yuan and took it back to 20 yuan. What toys did she buy? □□□□□□ =□ (species)

(3) What other math questions can you ask?