脱式计算,能简算的要简算.①99×0.625+0.625②(53.76-17.49)÷1.8
脱式计算,能简算的要简算.①99×0.625+0.625②(53.76-17.49)÷1.8③(0.8×7+4.56÷1.9)×12.5④15.73-(2.17+0.73...
脱式计算,能简算的要简算.①99×0.625+0.625②(53.76-17.49)÷1.8 ③(0.8×7+4.56÷1.9)×12.5 ④15.73-(2.17+0.73)-1.83.
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(1)99×0.625+0.625, =(99+1)×0.625, =100×0.625, =62.5; (2)(53.76-17.49)÷1.8, =36.27÷1.8, =20.15; (3)(0.8×7+4.56÷1.9)×12.5, =(5.6+2.4)×12.5, =8×12.5, =100; (4)15.73-(2.17+0.73)-1.83, =15.73-2.17-0.73-1.83, =(15.73-0.73)-(2.17+1.83), =15-4, =11. |
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