百度文库四年级上册数学口算题 四年级上册数学课本口算

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一、二、三、三、四、五、五、五、五、640--> 80 = 15 x 5 = 23 x 3 = 12 x 2 x 5 = 480 "；80 = 16 x 5 = 27 x 3 = 90 "；15 = 48 = 640：4等于640：16 = 24 x 20 = 32 x 3 = 48：16 = 12 x 8 = 27 x 3 = 56 = 247 = 24 x 24 x 24 x 2 = 83 = 560 = 247 = 247 x 247 = 247 x 45 = 247 x 64 = 247 x 45 = 247 x 45 = 247 x 64 = 247 x 45 = 247 x 247 = 24 x 64 = 24 = 24 20 = 40× 30 = 37+26 = 76-39 = 605+59 = 30×23 = 12×8 = 48+27 = 4500 x 20 = 73+15 = 200 x 600 = 280 x 400 = 280+270 = 6000 = 4 x 2500 = 6000 = 40 = 5×1280 = 310-70 = 14 = 470+180 = 1000； 25 = 160×600 = 20×420 = 290×300 = 8100 = 300 = 7600：200 = 680+270 = 980-14 = 4200 = 247：30 = 6 x 1300 = 1300 = 200 x 50 = 200 x 48 = 930+280 = 92002 400 = 840 = 247；21 = 180×500 = 800 = 500 = 1900 = 20 = 200×160 = 8700；300 = 300 x 330 = 3 x 1400 = 7000：14等于600：12等于9600：80 = 140 x 300 = 8800：40 = 9600 = 750-290 = 5×490 = 767×20 = 7500 = 370×200 = 650 = 13 = 8600-4200 = 240×4 = 640 = 80 = 15×10 = 12×11 = 160×30 = 220×40 = 104×5 = 4500：50 = 20 × 2 = 90 = 270 247：30 = 270×30 = 270×30 = 84 = 27 = 76：9 = 66 87247 = 100-54 = 23+15 = 360 = 4 = 55 = 5 = 32×6 = 7 = 70 = 200 = 40 = 180-40 = 140×2 = 140×7 = 13 x13 = 280×3 = 350×2 = 50×11 = 250×6 = 250×6 = 7 = 410-201 = 48×20 = 6600-600 = 390+140 = 11×80 = 24×50 = 3600 = 400 = 400-70 = 530-70 = 420-90 = 9600 = 30 = 7×700 = 203+98 = 1800 = 300 = 240+570 = 4800 = 370+580 = 580-490 = 420-900 = 420-900 = 170+320-51 = 520-260 = 35×200 = 22×22

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