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Elementary school mathematics oral arithmetic mental arithmetic quick calculation practice every day, grade 4, next 7 pages, wisdom island answer.
17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

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