The answer to the new synchronous exercise of mathematics in the second volume of the fourth grade is 47 pages. Emergency, emergency, emergency, emergency ! ! ! ! ! ! !

I. 1.50 2.20

Two. 1.( 10- 1) times 4=9 times 4=36 (pieces)

2.(20- 1) times 4= 19 times 4=76 (pieces)

3.(30- 1) times 4=29 times 4= 1 16 (pieces)

Three. 1.(48 divided by 4+ 1) times (48 divided by 4+1) = (12+1) times (12+1) = 60.

2.44 Divided by 4+1=1+1=12 (name)

Four. 1.(20- 1) times 4= 19 times 4=76 (tree)

2. Place all five corners (5- 1) multiplied by 5=4 multiplied by 5=20 (basin).

3.(40 divided by 2) times 4=20 times 4=80 (root)

See if it's right, dear. Take it.