计算下面各题,怎样简便就怎样计算.49×102-2×49 125×76×8 8.33-2.43-4.57 103×32 6.7+2.63+4
计算下面各题,怎样简便就怎样计算.49×102-2×49125×76×88.33-2.43-4.57103×326.7+2.63+4.341000÷8÷1255824÷8...
计算下面各题,怎样简便就怎样计算.49×102-2×49 125×76×8 8.33-2.43-4.57 103×32 6.7+2.63+4.3 41000÷8÷125 5824÷8×(85-78) 840÷28+70×18.
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49×102-2×49
=49×(102-2)
=49×100
=4900;
125×76×8
=125×8×76
=1000×76
=76000;
8.33-2.43-4.57
=8.33-(2.43+4.57)
=8.33-7
=1.33;
103×32
=100×32+3×32
=3200+96
=3296;
41000÷8÷125
=41000÷(8×125)
=41000÷1000
=41;
5824÷8×(85-78)
=728×7
=5096;
840÷28+70×18
=30+1260
=1290.
=49×(102-2)
=49×100
=4900;
125×76×8
=125×8×76
=1000×76
=76000;
8.33-2.43-4.57
=8.33-(2.43+4.57)
=8.33-7
=1.33;
103×32
=100×32+3×32
=3200+96
=3296;
41000÷8÷125
=41000÷(8×125)
=41000÷1000
=41;
5824÷8×(85-78)
=728×7
=5096;
840÷28+70×18
=30+1260
=1290.
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