直接写出得数.①0.125×32×2.5=②99
直接写出得数.①0.125×32×2.5=②999×999+999=③325÷125÷8=④20132-20122=⑤10012-1001=⑥6.125+71519+37...
直接写出得数.①0.125×32×2.5=②999×999+999=③325÷125÷8=④20132-20122=⑤10012-1001=⑥6.125+71519+378+2419=
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①0.125×32×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
②999×999+999
=999×(999+1)
=999×1000
=999000
③325÷125÷8
=325÷(125×8)
=325÷1000
=0.325
④20132-20122
=(2013+2012)×(2013-2012)喊笑
=4025×1
=4025
⑤10012-1001
=1001×(1001-1)
=1001×1000
=1001000
⑥6.125+7
+3
+2
=(6.125+3
)+(7
+2
)派颂
=10+10
=20.尘渗郑
=(0.125×8)×(4×2.5)
=1×10
=10
②999×999+999
=999×(999+1)
=999×1000
=999000
③325÷125÷8
=325÷(125×8)
=325÷1000
=0.325
④20132-20122
=(2013+2012)×(2013-2012)喊笑
=4025×1
=4025
⑤10012-1001
=1001×(1001-1)
=1001×1000
=1001000
⑥6.125+7
15 |
19 |
7 |
8 |
4 |
19 |
=(6.125+3
7 |
8 |
15 |
19 |
4 |
19 |
=10+10
=20.尘渗郑
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