《2025年通城学典计算能手四年级数学下册北师大版》

一、直接写出得数。
$9 - 0.09 =$ $6.4×0.8 =$ $72.9 + 0.9 =$
$8.92 + 1.08 =$ $3.25×0.2 =$ $0.48×0.01 =$
$3.8 - 2.8 =$ $10 - 0.85 =$ $0.92 + 3.6 =$
$0.105×100 =$ $15.6×0.1 =$ $4×3.14 =$
$0.54 + 0.46 =$ $0.05 + 0.55 =$ $18.6 - 4.32 =$
$3.5×0.2 =$ $7×2.07 =$ $0.98×0.4 =$
$2.6 - 0.7 =$ $1.8 + 0.46 =$ $0.3 + 0.47 =$
$2.5×1.2 =$ $3.5 - 0.55 =$ $3.02×10 =$
$0.15 + 1.3 =$ $16×0.4 =$ $5.6 - 2.3 =$
$4.9×a =$ $14×b =$ $b×b =$

答案： 8.91 5.12 73.8
10 0.65 0.0048
1 9.15 4.52
10.5 1.56 12.56
1 0.6 14.28
0.7 14.49 0.392
1.9 2.26 0.77
3 2.95 30.2
1.45 6.4 3.3
4.9a 14b $b^{2}$

二、用竖式计算。
$48.76 + 15.4$ $57 - 12.48$ $6.02×4.6$

答案： 64.16 44.52 27.692