四年级口算练习四年级口算练习 64080= 155= 233= 1225= 48080= 165= 273= 9015= 484= 64016= 393= 2420= 323= 4816= 128= 273= 5614= 248= 142= 8345= 56080= 9624= 4020= 4030= 3726= 7639= 60559= 3023= 128= 2732= 4827= 450020= 7315 = 120600 = 200360= 6800400= 280270= 42500= 600040= 51280= 31070= 40014= 470180= 100025= 160600= 20420= 290300= 8100300= 7600200= 7600400= 680270= 98014= 420030= 61300= 130050= 20048= 930660= 530280= 9200400= 84021= 180500= 8000500 = 190020= 200160= 8700300= 300330= 31400= 700014= 60012= 960080= 140300= 880040= 9600800= 750290= 5490= 76020= 7500500= 370200= 65013= 86004200= 2404= 64080= 1510= 1211= 16030= 22040= 1045= 450050= 1202= 9030= 27030= 27030= 8421= 769= 667= 10054= 12315= 3604= 555= 326=