脱式计算(3+1.2)÷0.5 (2.3÷4)×3.2 3.98÷(3.2+1.8)5÷0.15-...
脱式计算(3+1.2)÷0.5(2.3÷4)×3.23.98÷(3.2+1.8)5÷0.15-3.2×0.153.2×[0.75÷(0.3+1.2)]....
脱式计算(3+1.2)÷0.5 (2.3÷4)×3.2 3.98÷(3.2+1.8)5÷0.15-3.2×0.15 3.2×[0.75÷(0.3+1.2)].
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(1)(3+1.2)÷0.5
=4.2÷0.5
=84;
(2)(2.3÷4)×3.2
=0.575×3.2
=1.84;
(3)3.98÷(3.2+1.8)
=3.98÷4
=0.995;
(4)5÷0.15-3.2×0.15
=
-
=
;
(5)3.2×[0.75÷(0.3+1.2)]
=3.2×[0.75÷1.5]
=3.2×0.5
=1.6.
=4.2÷0.5
=84;
(2)(2.3÷4)×3.2
=0.575×3.2
=1.84;
(3)3.98÷(3.2+1.8)
=3.98÷4
=0.995;
(4)5÷0.15-3.2×0.15
=
100 |
3 |
12 |
25 |
=
2464 |
75 |
(5)3.2×[0.75÷(0.3+1.2)]
=3.2×[0.75÷1.5]
=3.2×0.5
=1.6.
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