脱式计算(能简算的要简算).(1)99×99+99(2)[(320+2.1)×47]÷0.9(3)8÷8÷0.125(4)37×39-29×37(5)1.8÷2.7÷0.6×2.7(6)0.5+[56

题目简介

脱式计算(能简算的要简算).(1)99×99+99(2)[(320+2.1)×47]÷0.9(3)8÷8÷0.125(4)37×39-29×37(5)1.8÷2.7÷0.6×2.7(6)0.5+[56

题目详情

脱式计算(能简算的要简算).
(1)99×99+99
(2)[(
3
20
+2.1)×
4
7
]÷0.9

(3)8÷8÷0.125
(4)37×39-29×37
(5)1.8÷2.7÷0.6×2.7
(6)0.5+[
5
6
÷(0.15+
9
20
)]
题型:解答题难度:中档来源:不详

答案

(1)99×99+99,
=99×(99+1),
=99×100,
=9900;

(2)[(class="stub"3
20
+2.1)×class="stub"4
7
]÷0.9

=[2.25×class="stub"4
7
]÷0.9,
=class="stub"9
7
×class="stub"10
9

=class="stub"10
7


(3)8÷8÷0.125,
=1÷0.125,
=8;

(4)37×39-29×37,
=37×(39-29),
=37×10,
=370;

(5)1.8÷2.7÷0.6×2.7,
=1.8×class="stub"1
2.7
×class="stub"1
0.6
×2.7,
=(1.8×class="stub"1
0.6
)×(2.7×class="stub"1
2.7
),
=3×1,
=3;

(6)0.5+[class="stub"5
6
÷(0.15+class="stub"9
20
)]

=0.5+[class="stub"5
6
÷class="stub"12
20
],
=0.5+class="stub"25
18

=class="stub"17
9

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