计算下面各题.怎样算简便就怎样算.103×46800÷(48+32) 46+46×99630÷42720÷48 (48+77)×(84-36)
(1)103×46
=(100+3)×46
=100×46+3×46
=4600+138
=4738;
(2)800÷(48+32)
=800÷80
=10;
(3)46+46×99
=46×(1+99)
=46×100
=4600;
(4)630÷42
=630÷7÷6
=90÷6
=15;
(5)720÷48
=720÷8÷6
=90÷6
=15;
(6)(48+77)×(84-36)
=125×48
=125×8×6
=1000×6
=6000.
=(100+3)×46
=100×46+3×46
=4600+138
=4738;
(2)800÷(48+32)
=800÷80
=10;
(3)46+46×99
=46×(1+99)
=46×100
=4600;
(4)630÷42
=630÷7÷6
=90÷6
=15;
(5)720÷48
=720÷8÷6
=90÷6
=15;
(6)(48+77)×(84-36)
=125×48
=125×8×6
=1000×6
=6000.
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