| 6.3×8.7+8.7×3.7 | ( - + )×12 | × + ÷ . |
=(6.3+3.7)×8.7
=10×8.7
=87;
②(
-
+
)×12 =
×12-
×12+
×12=4-2+3
=5;
③
×
+
÷
.=
×
+
×
=(
+
)×
=2×

=1
.分析:这三道题使用乘法分配律能使计算简便,由此解答即可.
点评:此题主要考查运算定律的运用.
编辑:chaxungu时间:2026-04-27 10:45:11分类:小学数学题库
| 6.3×8.7+8.7×3.7 | ( - + )×12 | × + ÷ . |
-
+
)×12
×12-
×12+
×12
×
+
÷
.
×
+
×
+
)×

.