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1、 小学三年级四则混合运算及答案4081224 = 408 - 288 = 120（4628）60 = 74 x 60 = 4440425017 = 2100- 17 = 2083321055 = 32 + 21 = 53420（327238） = 420 x 89 = 37380(4121+2389)7 = 6510 7 = 9303.416（0.01635） = 3.416 0.56 = 6.10.8(106.76)1.2 = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.165.670.2-0.62 = 1.134-0.62 = 0.5140.40.70.25 = 0.4
2、x 0.25 x 0.7 = 0.1 x 0.7 = 0.070.78+5.436+1 = 6.216 +1 = 7.21630.814(9.851.07) = 30.8 (14 - 10.92) = 30.83.08 = 1060(9.528.9)0.18 = (60- 38.4)0.18 = 21.6 0.18 = 1202.8810.430.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.8620(2.441.8)0.40.15 = 20x (0.64 0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 3528-(3.4+1
3、.252.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.62.557.1+2.457.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.50.815.5-(3.21+5.79) = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2（31.8+3.24）5 = (31.8 + 12.8)5 = 44.65 = 8.9231.54(6+3) = 126 9 = 1422.5+2.52 = 0.8 + 1.25 =2.0519464.81.80.9 = 194 -36 x0.9 = 194-32.4 = 161.651807056 =
4、 5180 - 4230=950242.42.50.8 =10 -2=8405(3213-3189) =405x24 = 9720125(97-81) =125x16 =20006942+4803 = 6942 + 160 = 678220+804-20 = 20 + 20 -20 = 40 -20 = 20100（32-30）0 = 100 2 x0= 50 x0 = 0254-125 = 100 - 60 = 4070（42-42）18=70 x (018) = 70x0 = 07565+7535 = 75 x (65 +35) = 75x100 = 75006-1.64= 6- 0.4
5、= 5.65.38+7.85-5.37= 13.23 - 5.37=7.867.20.8-1.25=9 - 6 =36-1.193-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 26.5（4.8-1.24）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 00.681.9+0.321.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.910.15-10.750.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.155.8（3.87-0.13）+4.23.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.432.52-（6+9.7283.2）2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97（136+64）（65-34523）= 200x(65-15) = 200x 50=10000
小学三年级四则混合运算及答案
