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7.2÷16 08脱式计算,怎么算?

(30-7x2)÷2 =(30-14)÷2 =16÷2 =8

(1)[ 7 10 -( 1 2 + 2 5 ×50%)]÷ 16 7 =[ 7 10 -( 1 2 + 2 5 × 1 2 )]× 16 7 ,=[ 7 10 -( 1 2 + 1 5 )]× 16 7 ,=[ 7 10 - 7 10 ]× 16 7 ,=0× 16 7 ,=0;(2) 5 4 - 5 4 ÷5× 2 3 = 5 4 - 5 4 × 1 5 × 2 3 ,= 5 4 - 1 6 ,= 13 12 ...

①72.8÷2.5÷4,=72.8÷(2.5×4),=72.8÷10,=7.28;②0.83×7.2+0.83×2.8,=0.83×(7.2+2.8)=0.83×10,=8.3;③18.305÷0.14-58.67,=130.75-58.67,=72.08;④7.8×9.9,=7.8×(10-0.1),=7.8×10-7.8×0.1,=78-0.78,=77.22.

7.2÷4.8 =(7.2÷8)÷(4.8÷8) =0.9÷0.6 =9÷6 =3÷2 =1.5

2-8/3/16/7-7/1脱式计算 2-3/8÷7/16-1/7 =2-3/8*16/7-1/7 =2-(6/7+1/7) =2-1 =1

1.53+23.4÷7.2 =1.53+3.25 =4.78

3.75+16.7+2.85+8.5 =6.6+16.7+8.5 =23.3+8.5 =31.8

(1)25×4.4,=25×4+25×0.4,=100+10,=110;(2)7.7×0.16÷7.7×12.5,=7.7÷7.7×0.8×0.2×12.5,=1×0.2×12.5×0.8,=0.2×10,=2;(3)10.64÷(3.7-2.9),=10.64÷0.8,=13.3;(4)4.8×99+4.8,=4.8×(99+1),=4.8×100,=480;(5)47.3+21×(3...

18-7-9 =11-9 =2

14.4/3.6+7.2 =4*3.6/3.6+2*3.6 =4*1+7,2 =11.2

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