When you subtract 5 from 47 in grade one, count who is counting first, and divide 47 by 40+7.

7-5=2.

Then 40+2=42.

47-9=38 What's important first, then what's important. Level 1 solution:

47-9=38

First, 17-9=8.

Then 47- 17=30.

Finally, 8+30=38.

Count 37-9 with your mouth. Count 37-9 first.

Solution:

37-9

=37-7-2

=30-2

=28

374=4 1, first, then, uh, uh, you have the wrong number.

86+7=93 Think: calculate () first and then () and () 73+20=93 Think: calculate () first and () first and () first. This is 1 in Grade One, and calculate 6+7= 13 first.

2, first 70+20=90, then 90+3=93.

A math problem in grade one, 36 minus 8, what can be worked out first? 30=20+ 10.

6+ 10= 16

16-8=8

20+8=28

For freshmen, first calculate 48+4=88, and then calculate 8+4= 12.

40+ 12=52.

Who worked out the normal solution of the first grade problem?

because

Fill in odd and even numbers or even and odd numbers in the first line to get odd 1.

Fill in the odd number and even number or even number and odd number in the second line to get the odd number 9.

Fill in the third line with odd and even numbers or even and odd numbers to get odd 7.

Fill in the fourth row with odd numbers and odd numbers or even numbers and even numbers to get even number 2.

It can be seen that it takes 5 odd numbers and 3 even numbers or 5 even numbers and 3 odd numbers to meet the conditions.

But four odd numbers and four even numbers are given, so the result cannot be achieved.

Brainstorming can be solved

This result can be achieved by rotating 6 into 9.

4-3= 1

1+8=9

2+5=7

9-7=2

Who can do the first grade questions? 172 10

42 17

3 102

843 1

See it this way?

How to do the first ten points method? 13-6 is nothing first, and then it is the first ten points method.

Calculation: 13-6,

Divide 13 into 10 and 3,

Let's calculate first: 10-6 = 4,

Recalculate: 4+3 = 7,