题目内容
【题目】计算,能简便计算的要简便计算。
①350×78+35×220
②3.5÷0.125×8
③
×3.4-
×
-
×
④8×(
+
)+ ![]()
⑤
+
⑥999×999+999
【答案】解:
①350×78+35×220
=350×78+350×22
=350×(78+22)
=350×100
=35000
②3.5÷0.125×8
=3.5÷
×8
=3.5×8×8
=224
③
×3.4-
×
-
×
=
×(3.4-
-
)
=
×1.4
=0.8
④8×(
+
)+ ![]()
=8×
+8×
+ ![]()
=3+
+ ![]()
=3+(
+
)
=3+1
=4
⑤
+
=(
) ![]()
=1 ![]()
= ![]()
⑥999×999+999
=999×(999+1)
=999×1000
=999000![]()
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