97 - 20 = 93 - 53 = 91 - 58 = 87 - 58 = 87 - 66 = 60 - 14 = 29 2 = 70 - 57 = 79 - 75 = 44 75 = 25 - 12 = 72 - 23 = 96 75 = 84 - 59 = 84 - 23 = 4 33 = 91 81 = 6 3 = 58 - 19 = 21 29 = 14 33 =
47 90 = 84 - 26 = 61 46 = 22 56 = 28 74 = 52 76 = 35 - 2 = 11 75 = 57 72 = 36 46 = 26 - 19 = 13 38 = 63 - 6 = 93 - 40 = 47 - 4 = 16 40 = 30 46 = 100 46 = 76 63 = 74 81 = 98 43 = 78 -
65 28 = 68 32 = 15 38 = 23 - 11 = 98 70 = 89 - 65 = 87 - 16 = 86 - 10 = 9 27 = 76 5 = 81 8 = 91 - 29 = 99 - 10 = 83 - 31 = 65 - 7 = 19 23 = 85 93 = 78 10 = 88 80 = 83 - 79 = 46 - 45 = 29
【经典例题一】325÷25【思路导航】在除法里被除数和除数同时乘或除以一个相同的数商不变 325÷25 =(325×4)÷(25×4) =1300÷100 =13【练一练1】(1)450÷25 (2)525÷25 (3)3500÷125 (4)1
四年级数学思维训练——速算与巧算(三) : 【经典例题一】325÷25【思路导航】在除法里被除数和除数同时乘或除以一个相同的数商不变 325÷25 =(325×4)÷(25×4) =1300÷100 =13【练一练1】(1)450÷25
丰乐四年级数学思维训练——速算与巧算【经典例题一】325÷25【思路导航】在除法里被除数和除数同时乘或除以一个相同的数商不变 325÷25 =(325×4)÷(25×4) =1300÷100 =13【练一练1】(1)450÷25 (2)525÷25 (3)3500÷125
一年级数学计算训练七班别: : 成绩 3 2 = 4 1 = 5 – 1 = 3 – 2 = 2 – 2 = 5 0 = 4 – 1 = 3 1 = 1 2 = 5 – 2 =
心算 口算 巧算 速算 天天练2015021919-15= 18-9= 125= 15-8= 55=19-13= 184= 127= 14-5= 45=19-7= 122= 125= 14-7= 84=19-8= 192=
心算 口算 巧算 速算 练习题201503234( )13 3-( )2 13-( )2 810-3 10( )=13 8( )= 13 10-3= 913= 93= 92= 19-8= 12-2-9=9-3= 12-3= 13-2=812
心算 口算 巧算 速算 练习题1642-38= 3817= 5922= 83-72= 5737=99-80= 81-79= 4753= 4348= 87-79=4555= 87-67= 70-68= 6430= 6525=45-25= 45-25= 5745= 6
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