问题
解答题
脱式计算.步步为“赢”,胜利一定属于你!
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答案
(1)35×140-2987,
=4900-2987,
=1913;
(2)(
+2 7
)×35,1 5
=
×35+2 7
×35,1 5
=10+7,
=17;
(3)
÷(5 7
-2 3
),1 5
=
÷5 7
,7 15
=
;75 49
(4)0.34×5+0.96÷32,
=1.7+0.03,
=1.73;
(5)(
-5 6
)÷1 8
,5 12
=
÷17 24
,5 12
=
;17 10
(6)
÷[9 20
×(1 2
+2 5
)],4 5
=
÷[9 20
×1 2
],6 5
=
÷9 20
,3 5
=
.3 4