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243 x 25 x 3 x 4
= ( 243 x 3 ) x ( 25 x 4 )
= 729 x 100
= 72900
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =234x(45+54+1)
=234x100
=23400
b: =(8x125)x(50x20)
=1000x1000
=1000000
a = 243x(45+54+1)
=243 x 100
=24300
b = (20 x 50 ) x (8x125)
=1000x1000
=1000000
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a: =1250:25=50
b: =234(45+55)+234=23400+234=23634
c: =1000x1000=1000000
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200 x 100 + 350 - 346 = 20000 + 350 - 346 = 20350 - 346 = 20005
200 x 100+350 - 346=20000+350-346=20350-346=20004
(100+235) x 2-70=335 x 2-70=670-70=600
100 x 300 x 234 x 450=30000 x 234 x 450=7020000 x 450=3159000000
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`234 xx 1257 - 234 xx 257`
`= 234 xx (1257 -257)`
`= 234 xx 1000`
`= 234000`
`312 xx 415 + 312 xx 574 + 312`
`=312 xx 415 + 312 xx 574 + 312xx1`
`=312 xx(415 + 574+1)`
`= 312 xx 1000`
`= 312000`
234×1257−234×257234×1257-234×257
=234×(1257−257)=234×(1257-257)
=234×1000=234×1000
=234000=234000
312×415+312×574+312312×415+312×574+312
=312×415+312×574+312×1=312×415+312×574+312×1
=312×(415+574+1)=312×(415+574+1)
=312×1000=312×1000
=312000
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a, 455 456 + 234 348
b, 937 120 – 728 983
c, 234 x 34
d, 47056 : 34
![](https://rs.olm.vn/images/avt/0.png?1311)
2564*234 = 59976
9807*981 = 9620667
xin tiick
599976
9620667