Bài 1. Tính hợp lý (nếu có thể) 1) 4.52 – 32.(20150 + 1100) 2) 80 – (4.52 – 3.23) 3) 2448 : [119 – (23 – 6)] 4) 100 – (5.42 – 2.71) + 20130 5) 2457 : 33 – (65 – 2.52).22 6) (217 + 154).(319 – 217).(24 – 42) 7) 38 : 35 + 20150 – (100 – 95)2 8) 9.23 – 52.(20160 – 12016) 9) 34.176 – 34.76 10) 9.2.23 + 18.32 + 3.6.45 11) 236.145 + 236.856 – 236 12) 87.33 + 64.73 – 23.33 13) 52.45 + 52.83 – 28.52 14) (143.43 – 99.43 – 432) : 43 + 14 15) (102.132016 + 69.132016) : 132017 16) 32019 : (32020 – 24.32017)

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