内容正文:
新人教版小升初暑假提优辅导简便计算及答案
时量:40分钟 总分:100分
一、简便计算。
(1) ×(×)
(2) ×3.5-×3.5
(3) ×15.4-×3.4
(4) ×33+67×
(5) 12.5%×3+0.125×6+
(6) 3.2×12.5×2.5
(7) 532÷2.5÷4
(8) 113÷8÷1.25
(9) 99×4.1
(10) 3.4×+6.6×60%
(11) 15.4×-5.4×60%
(12) 2-(+1.75)
(13) 9×+
(14) 0.99×12.5+0.125
(15) 10-2-4-2
(16) 9+0.9+0.99+0.999
(17) 9+99+999+9999
(18) 1+3+5+7+9+11+13+15+17
(19) 1+3+5+7+9+11+13+11+9+7+5+3+1
(20) ++++
(21) +++++
(22) ++++
(23) +++++
(24) 1+2+3+4+…+100
(25) 3+6+9+12+…+99
参考答案:
(1) ×(×)
=××
=1×
=
(2) ×3.5-×3.5
=3.5×(-)
=3.5×1
=3.5
(3) ×15.4-×3.4
=×(15.4-3.4)
=×12
=5
(4) ×33+67×
=×(33+67)
=×100
=44
(5)12.5%×3+0.125×6+
=×(3+6+1)
=×10
=1.25
(6)3.2×12.5×2.5
=(0.4×2.5)×(8×12.5)
=1×100
=100
(7)532÷2.5÷4
=532÷(2.5×4)
=532÷10
=53.2
(8)113÷8÷1.25
=113÷(1.25×8)
=113÷10
=11.3
(9)99×4.1
=99×(4+0.1)
=396+9.9
=405.9
(10)3.4×+6.6×60%
=×(3.4+6.6)
=×10
=6
(11)15.4×-5.4×60%
=×(15.4-5.4)
=×10
=6
(12)2-(+1.75)
=2-1.75-
=1-
=
(13)9×+
=×(9+1)
=×10
=9
(14)0.99×12.5+0.125
=12.5×(0.99+0.01)
=12.5×1
=12.5
(15)10-2-4-2
=10-(2+4+2)
=10-9
=1
(16)9+0.9+0.99+0.999
=10+1+1+1-1-0.1-0.01-0.001
=12-0.111
=11.889
(17)9+99+999+9999
=10+100+1000+10000-1×4
=11110-4
=11106
(18)1+3+5+7+9+11+13+15+17
=9×9
81
(19)1+3+5+7+9+11+13+11+9+7+5+3+1
=7×7+4×4
=49+16
=65
(20)++++
=(1-)+(-)+(-)+(-)+(-)
=1-
=
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