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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