计算 (能简算的要简算,解答时,必须写出必要的解题步骤)(1)[20.75+(3.74-212)÷92325]÷41.75(2
计算(能简算的要简算,解答时,必须写出必要的解题步骤)(1)[20.75+(3.74-212)÷92325]÷41.75(2)99967+9967+967+67(3)(3...
计算 (能简算的要简算,解答时,必须写出必要的解题步骤)(1)[20.75+(3.74-212)÷92325]÷41.75(2)99967+9967+967+67(3)(3.91+337+6.09+647)×( 218-1.125)+(1÷23-1.5)×6.04.
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昧座初1533
2014-12-09
·
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(1)[20.75+(3.74-
2)÷
9]÷41.75,
=[20.75+1.24÷
9]÷41.75,
=[20.75+0.125]÷41.75,
=20.875÷41.75,
=0.5;
(2)
999+
99+
9+
,
=999+
+99+
+9+
+
,
=(999+99+9)+(
+
+
+
),
=(1000+100+10-3)+(
×4),
=(1110-3)+
,
=1107+3
,
=1110
;
(3)(3.91+
3+6.09+
6)×(
2-1.125)+(1÷
-1.5)×6.04,
=[(3.91+6.09)+(
3+
6)]×(
2-1.125)+(1÷
-1.5)×6.04,
=(10+10)×(
2-1.125)+(
-1.5)×6.04,
=20×1+0×6.04,
=20+0,
=20.
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