脱式计算(能简算的要简算)(45+14)÷73+710519×14+1319×147.6×35%+6.5×0.761349×21+13×2849.-数学

题目简介

脱式计算(能简算的要简算)(45+14)÷73+710519×14+1319×147.6×35%+6.5×0.761349×21+13×2849.-数学

题目详情

脱式计算(能简算的要简算)
4
5
+
1
4
)÷
7
3
+
7
10
5
19
×
1
4
+
13
19
×
1
4
7.6×35%+6.5×0.76
13
49
×21+13×
28
49
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"4
5
+class="stub"1
4
)÷class="stub"7
3
+class="stub"7
10

=class="stub"21
20
÷class="stub"7
3
+class="stub"7
10

=class="stub"9
20
+class="stub"14
20

=class="stub"23
20


(2)class="stub"5
19
×class="stub"1
4
+class="stub"13
19
×class="stub"1
4

=(class="stub"5
19
+class="stub"13
19
)×class="stub"1
4

=class="stub"18
19
×class="stub"1
4

=class="stub"9
38


(3)7.6×35%+6.5×0.76,
=7.6×0.35+0.65×7.6,
=7.6×(0.35+0.65),
=7.6×1,
=7.6;

(4)class="stub"13
49
×21+13×class="stub"28
49

=class="stub"21
49
×13+13×class="stub"28
49

=(class="stub"21
49
+class="stub"28
49
)×13,
=1×13,
=13.

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