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

×3.4- × - ×

④8×( + )+

+

⑥999×999+999

【答案】解:

350×78+35×220

=350×78+350×22

=350×(78+22)

=350×100

=35000

3.5÷0.125×8

=3.5÷ ×8

=3.5×8×8

=224

×3.4- × - ×

= ×(3.4- -

= ×1.4

=0.8

8×( + )+

=8× +8× +

=3+ +

=3+( +

=3+1

=4

+

=(

=1

=

999×999+999

=999×(999+1)

=999×1000

=999000

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