第1个回答 2014-01-24
1.68×24+32×24=(68+32)×24=2400
2.84×12+16×12=(84+16)×12=1200
用简便方法计算:*(要综合算式)
3.5×126+5×74
=5×(126+74)
=5×200
=1000
4.35×37+65×37
=37×(35+65)
=37×100
=3700
5.83×83+117×83
=83×(83+117)
=83×200
=16600
6.265×16+35×16
=16×(265+35)
=16×300
=4800
7.55×63-45×63
=63×(55-45)
=63×10
=630
8.35×24-35×4
=35×(24-4)
=35×20
=700
7.99×76
=(99+1)×76-76
=7600-76
=7524
8.303×24
=300×24+3×24
=7200+72
=7272
9.85×102
=85×100+85×2
=8500+170
=8670
10.406×201
=406×200+406
=81200+406
=81606
11.68×82+18×68
=68×(82+18)
=68×100
=6800
12.125×87-125×7
=125×(87-7)
=125×80
=10000
13.62×78+13×78+25×78
=78×(62+13+25)
=78×100
=7800
在横线上填合适的数,○中填相应的运算符号
99×63=(100-1)×63=100×63-1×63
102×55=(100+2)×55=100×55+2×55
94×99=(100-1)×94=100×94-1×94
45×102=100×45+2×45
250×104=250×100+250×4
24×55=24×50+24×5
87×11=87×10+87
第2个回答 2014-01-24
1.68X24+32X24=(_68__+_32__)X_24__=_2400__
2.84X12+16X12=(_84__+_16__)X__12_=1200___
用简便方法计算:*(要
综合算式)
3.5X126+5X74
=5×(126+74)
=5×200
=1000
4.35X37+65X37
=37×(35+65)
=37×100
=3700
5.83X83+117X83
=83×(83+117)
=83×200
=16600
6.265X16+35X16
=16×(265+35)
=16×300
=4800
7.55X63-45X63
=63×(55-45)
=63×10
=630
8.35X24-35X4
=35×(24-4)
=35×20
=700
7.99X76
=(100-1)×76
=100×76-1×76
=7524
8.303X24
=(300+3)×24
=300×24+3×24
=7128
9.85X102
=85×(100+2)
=85×100+85×2
=8670
10.406X201
=406×(200+1)
=406×200+406
=81606
11.68X82+18X68
=68×(82+18)
=68×100
=6800
12.125X87-125X7
=125×(87-7)
=125×80
=10000
13.62X78+13X78+25X78
=78×(62+13+25)
=78×100
=7800
在横线上填合适的数,○中填相应的运算符号
99X63=(_100__-__1_)X63=_100__X_63__-__1_X_63__
102X55=(100___+_2__)X_55__=_100__X_55__+ _2__X__55_
94X99=(_100__- _1__)× 94___=_100__X_94__- _1__X_94__
45X102=_100__X_45__+ _2__X__45_
250X104=_100__X_250__+ _4__X_250__
24X55=24X_50__+24X_5__
87X11=87X_10__+87
本回答被网友采纳
第3个回答 2014-01-24
1,(68+32)*24 2,(84+16)*123 3,5*(126+74)=5*200=1000 4,(35+65)*37=100*37=3700
5,83*(83+117)=83*200=16600 6,(265+35)*16=300*16=4800 7,(55-45)*63=10*63=630
8,35*(24-4)=35*20=700 7,(100-3)*76=100*76-3*76=7600-228=7372 8,(300+3)*24=300*24+3*24=7200+72=7272 9,85*(100+2)=85*100+85*2=8500+190=8690 10.406*(200+1)=406*200+406*1=81200+406=81606 11,68*(82+18)=68*100=6800 12.125*(87-7)=125*80=10000 13,78*(62+13+25)=78*100=7800