问题
解答题
计算下列各题.(能简算的要简算) 3.6-2.84+7.4-7.2 (4-0.2)÷1.9+0.1
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答案
(1)3.6-2.84+7.4-7.2,
=(3.6+7.4)-(2.84+7.2),
=11-10.04,
=0.96;
(2)(4-0.2)÷1.9+0.1,
=3.8÷1.9+0.1,
=2+0.1,
=2.1;
(3)
×[1-(4 29
-3 4
)],3 8
=
×[1-4 29
],3 8
=
×4 29
,5 8
=
;5 58
(4)
÷23+8 17
×1 23
,9 17
=
×8 17
+1 23
×1 23
,9 17
=(
+8 17
)×9 17
,1 23
=1×
,1 23
=
.1 23