2 1+50= 70- 1 1= 78- 17= 3 1+32=

26+40= 6×5= 4×4= 25+25=

95-20= 36+40= 83-83= 4×2=

75-40= 90-80= 50+37= 43+42=

27- 1 1= 37-3= 8+ 17= 55+45=

58+2= 46- 14= 3×3= 45+ 15=

90-29= 65+9= 43+37= 1× 1=

30+27= 7+36= 8+ 12= 10+22=

37-26= 72-7= 5+43= 38+22=

24-24= 4×3= 2×2= 60+35=

33-7= 49+ 1 1= 3×2= 6×2=

98+2= 12-7= 49+5 1= 38+ 12=

93-80= 96-8= 67+7= 27+35=

5×4= 4×6= 4+2= 40-2=

3×3+2= 4×5- 1= 6×6-7= 4×3+4=

Second, vertical calculation.

90-27= 38+49= 50- 1 1=

16+28+39= 62-27- 16= 53-30+ 14=

Third, complete the following multiplication formula.

One four () two () get six three five ()

() 5 13 () gives 944 ()

() Four is eight or five () Twenty-five and five or six ()

4. Fill in "+,"or ╳ "In".

3○3=9 1○ 1= 1 6○3=3 4○0=0

2○3=5 4○6=24 5○3= 15 1○2=2

I can calculate in tabular form.

What is the sum of 1 and 6? What's the difference between 2,4 times the product of 6 and 8?

How much is 3.46 more than 28? How much is 4.34 more than 17?

Sixth, solve the problem:

1, boys 22, girls 2 1. 16 people participated in the relay race. How many people did not take part in the relay race?

2. Three groups * * * collected 94 soda bottles, one group collected 34 people, the second group collected 29 people, how many did the three groups collect?

3. I am 8 years old, my father is 35 years old, and how old are you when my father is 50?

4、

Pens are more expensive than pencils. How much is a pen, 6 yuan?

(2) How much is a bowl of noodles, 7 yuan, five bowls of noodles?

(3) Please put forward the parallel calculation of the multiplication problem. ?