脱式计算(能简算的要简算): 62.8×19-8×62 4 5 -62 4 5 3.64×[1÷(2
脱式计算(能简算的要简算):62.8×19-8×6245-62453.64×[1÷(2110-2.09)]1800-1350÷18×6(2512+158+2712+3.3...
脱式计算(能简算的要简算): 62.8×19-8×62 4 5 -62 4 5 3.64×[1÷(2 1 10 -2.09)] 1800-1350÷18×6 (2 5 12 +1 5 8 +2 7 12 +3.375)× 3 20 1.9-1.9×(1.9-1.9) (1-1%×70)÷ 2 7 .
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(1)62.8×19-8× 62
=62.8×(19-8-1), =62.8×10, =628; (2)3.64×[1÷(2
=3.64×[1÷0.01], =3.64×100, =364; (3)1800-1350÷18×6, =1800-75×6, =1800-450, =1350; (4)( 2
=(5+5)×
=
(5)1.9-1.9×(1.9-1.9), =1.9-0, =1.9; (6)(1-1%×70) ÷
=(1-
=
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