怎样算简便就怎样算.①46×8-120÷15②49×67+49÷7③6.28+7.13-(5.13+3.28)④23+(45-23)×53⑤(12.5×8-40)÷0.6⑥(512-19+38)×72

题目简介

怎样算简便就怎样算.①46×8-120÷15②49×67+49÷7③6.28+7.13-(5.13+3.28)④23+(45-23)×53⑤(12.5×8-40)÷0.6⑥(512-19+38)×72

题目详情

怎样算简便就怎样算.
①46×8-120÷15
4
9
×
6
7
+
4
9
÷7
③6.28+7.13-(5.13+3.28)
2
3
+(
4
5
-
2
3
5
3

⑤(12.5×8-40)÷0.6
⑥(
5
12
-
1
9
+
3
8
)×72.
题型:解答题难度:中档来源:不详

答案

①46×8-120÷15,
=368-8,
=360;

class="stub"4
9
×class="stub"6
7
+class="stub"4
9
÷7,
=class="stub"4
9
×class="stub"6
7
+class="stub"4
9
×class="stub"1
7

=(class="stub"6
7
+class="stub"1
7
)×class="stub"4
9

=1×class="stub"4
9

=class="stub"4
9


③6.28+7.13-(5.13+3.28),
=6.28+7.13-5.13-3.28,
=(6.28-3.28)+(7.13-5.13),
=3+2,
=5;

class="stub"2
3
+(class="stub"4
5
-class="stub"2
3
)×class="stub"5
3

=class="stub"2
3
+class="stub"4
5
×class="stub"5
3
-class="stub"2
3
×class="stub"5
3

=class="stub"2
3
+class="stub"4
3
-class="stub"10
9

=2-class="stub"10
9

=class="stub"8
9


⑤(12.5×8-40)÷0.6,
=(100-40)÷0.6,
=60÷0.6,
=100;

⑥(class="stub"5
12
-class="stub"1
9
+class="stub"3
8
)×72,
=class="stub"5
12
×72-class="stub"1
9
×72+class="stub"3
8
×72,
=30-8+27,
=22+27,
=49.

更多内容推荐