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\(91.51+49.163+49.72\)
\(=91.51+49.\left(163+72\right)\)
\(=91.51+49.235\)
\(=4641+11515\)
\(=16156\)
-25 x 72 + 25 x 21 - 49 x 25
= 25 x (-72 + 21 - 49)
= 25 x (-100)
= -2500
-25 x 72 + 25 x 21 - 49 x 25
= 25 x ( -72 ) + 25 x 21 - 49 x 25
= 25 x ( -72 + 21 - 49 )
= 25 x ( - 100 )
= -2500
`#3107.101107`
\(\text{53 x 51 + 4 + 53 x 49 + 91 + 53}\)
\(=53\times\left(51+49\right)+\left(4+91+53\right)\\ =53\times100+148\\ =5300+148\\ =5448\)
\(53\times51+4+53\times49+91+53\)
\(=53\times\left(51+49\right)+\left(4+53+91\right)\)
\(=53\times100+148\)
\(=5300+148\)
\(=5448\)
Ta có: \(13\cdot\left(-47\right)-53\cdot13\)
\(=13\cdot\left(-47-53\right)\)
\(=13\cdot\left(-100\right)=-1300\)
Ta có: \(27\cdot\left(-67\right)+33\cdot\left(-27\right)\)
\(=27\cdot\left(-67\right)-33\cdot27\)
\(=27\left(-67-33\right)\)
\(=27\cdot\left(-100\right)=-2700\)
Ta có: \(-49\cdot65+36\cdot\left(-49\right)+49\)
\(=-49\cdot65+\left(-49\right)\cdot36+\left(-49\right)\cdot\left(-1\right)\)
\(=-49\cdot\left(65+36-1\right)\)
\(=-49\cdot100=-4900\)
Ta có: \(136\cdot\left(-47\right)+36\cdot47\)
\(=\left(-136\right)\cdot47+36\cdot47\)
\(=47\cdot\left(-136+36\right)\)
\(=47\cdot\left(-100\right)=-4700\)
Ta có: \(\left(-48\right)\cdot72+36\cdot\left(-304\right)\)
\(=-96\cdot36+36\cdot\left(-304\right)\)
\(=36\cdot\left(-96-304\right)\)
\(=36\cdot\left(-400\right)=-14400\)
91 x 51 + 49 x 163 - 49 x 72
= 91 x 51 + 49 x ( 163 - 72 )
= 91 x 51 + 49 x 91
= 91 x ( 51 + 49 )
= 91 x 100
= 9100
91x51 + 49x163-49x72
=91x51+49x( 163-72)
=91x51+49x91
=91x(51+49)
=91x100
=9100