9月18日五上小数简便运算过关题
(1) 3.9-4.1+6.1-5.9 (2)35.6-1.8-15.6-7.2
(3)19.625-(7.625-4.716) (4)9.9+99.9+999.9+0.3
(5)12.5×8.8 (6)24×9.9
(7)(2.5-0.25)×4 (8)23.5×5.67-23.5×5.66
(9)80×(0.25×0.125)×4 (10)0.125×2.5×0.5 ×32
(11) 35.6÷(3.56×0.2) (12) 0.76×6.92+0.76×4.08-0.76
(13) 15.6×13.1-15.6-15.6×2.1 (14) 28.9×4.68+4.68×61.1+46.8
(15) 6.66×1.2+3.33×7.6 (16)99×(9.3-3.7)+5.6
(17)(2.4+2.4+2.4+2.4) ×2×1.25 (18)4.65×32+2.5×46.5+0.465×430
(19) 0.65×10.1 (20) 8.43×6.8+8.43×2.7+9.5×1.57
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