口算我最棒!3×17×13=58×35=14×38×4=(17+16)×42=34×16=25×9+25=34×5-34=(13+12)×6=16×13×6=-数学

题目简介

口算我最棒!3×17×13=58×35=14×38×4=(17+16)×42=34×16=25×9+25=34×5-34=(13+12)×6=16×13×6=-数学

题目详情

口算我最棒!
1
7
×
1
3
=
5
8
×
3
5
=
1
4
×
3
8
×4
=
(
1
7
+
1
6
)×42
=
3
4
×
1
6
=
2
5
×9+
2
5
=
3
4
×5-
3
4
=
(
1
3
+
1
2
)×6
=
16×
1
3
×6
=
题型:解答题难度:中档来源:不详

答案

①3×class="stub"1
7
×class="stub"1
3
=class="stub"1
7
; ②class="stub"5
8
×class="stub"3
5
=class="stub"3
8
; ③class="stub"1
4
×class="stub"3
8
×4=class="stub"3
8

④(class="stub"1
7
+class="stub"1
6
)×42=13; ⑤class="stub"3
4
×class="stub"1
6
=class="stub"1
8
;⑥class="stub"2
5
×9+class="stub"2
5
=4;
class="stub"3
4
×5-class="stub"3
4
=3; ⑧(class="stub"1
3
+class="stub"1
2
)×6=5; ⑨16×class="stub"1
3
×6=32.

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