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7.2÷16 08脱式计算,怎么算?

7.2÷1.6+0.8 4.5+0.8 =5.3

(1)72×28+324÷6=2016+54=2070; (2)567÷7×24=81×24=1944; (3)248+52×68=248+3536=3784.

18-7-9 =11-9 =2

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.

1.4/9× 9/16- 4/3 2. 8/19 × 15/36 + 1/127 3. 121× 5/16 – 2/9 ×3 4. 18× 5/4 + 1/4 5. 16÷ 3/8 – 3/8 ÷6 6. 4/17 × 5/19 + 3/7 × 5/19 7. 5/12 -( 3/2 + 4/5 ) 8. 7/18 + ( 1/18 + 1/9 ) 9. 19 × 5/6 + 5/16 10. 13/14 × 8/19 - 1/3 11. 7...

(1)495÷55+495÷45=9+11=20(2)3.3×34+0.75×5710+75%=3.3×0.75+5.7×0.75+0.75=(3.3+5.7+1)×0.75=10×0.75=7.5(3)12345432155555×55555×614=11111×111115×11111×5×11111×254=14(4)[16.5×7.2÷557×(12.5%-18)]×1519=[16.5×7.2×755×(18-18...

(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...

请把题目写清楚

(1)460+540÷20×5 =460+27×5, =460+135, =595; (2)98.7×0.9+9.87 =98.7×(1-0.1)+9.87, =98.7×1-98.7×0.1+98.7, =98.7×2-9.87, =197.4-9.87, =187.53; (3)(11÷46+18÷23)×92 =(11 46 +18 23 )×92, =11 46 ×92+18 23 ×92, =22...

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