二、位置-【黄冈小状元·同步计算天天练】2023-2024小学五年级上册数学状元小练（人教版）

二、位置◆ 二、位置 1.列竖式计算。 0.4×0.79= 1.06×2.5 0.067×1.3= 7.43×0.18 5.44×80 2.35×0.16 (得数保留两位小数) (得数保留整数) (得数保留一位小数) 2.计算下面各题。你认为怎样简便就怎样算。 1.32×9.9+1.32×0.1 2.3×9.8 8.7+1.2×0.35 = = = 每因日得对于混合运算题，能用简便方法计算的，用简便方法计算：不能简算的，按运 15◆ 算顺序计算。附录参考答案 原式=7.2×0.89+7.2×0.11 第15页 2.3×9.8 =7.2×(0.89+0.11) 1.0.4×0.79=0.316 =2.3×(10-0.2) =7.2×1 0.79 =2.3×10-2.3×0.2 =7.2 ×0.4 0.316 =23-0.46 方法二： 1.06×2.5=2.65 =22.54 原式=0.72×8.9+0.72×1.1 1.06 8.7+1.2×0.35 =0.72×(8.9+1.1) ×2.5 =0.72×10 =8.7+1.2×0.5×0.7 530 =7.2 212 =8.7+0.42 2.65N 3.64×10.1-36.4 =9.12 0.067×1.3=0.0871 =3.64×10.1-3.64×10 第16页 0.067 =3.64×(10.1-10) ×1.3 1.76.8÷8=9.6 =3.64×0.1 201 9.6 =0.364 67 876.8 0.0871 72 17.48×37-174.8×1.9+ 48 7.43×0.18≈1.34 4 17.48×82 0 7.43 =17.48×37-17.48×19+ ×0.18 25.6÷16=1.6 17.48×82 5944 =17.48×(37-19+82) 743 1.6 1625.6 1.3374 16 =17.48×100 96 5.44×80≈435 96 =1748 0 5.44 172.4×6.2+1724×0.38 80 6.48÷6=1.08 =172.4×6.2+172.4×3.8 435.2Q 1.08 =172.4×(6.2+3.8) 2.35×0.16≈0.4 66.48 =172.4×10 2.35 6 =1724 0.16 48 1410 48 5.55×445+55.5×56.5-55.5 235 0 =55.5×44.5+55.5×56.5 0.3760 14.21÷7=2.03 -55.5 2. 1.32×9.9+1.32×0.1 2.03 =55.5×(44.5+56.5-1) =1.32×(9.9+0.1) 714.21 14 =55.5×100 =1.32×10 21 21 =5550 =13.2 0 55