《2025年阳光同学计算小达人四年级数学下册人教版》

1. 根据运算律填上合适的数。
$15 + 17 = \_\_\_ + 15$ $378 - 39 - 39 = 378 - (\_\_\_ + \_\_\_)$
$25 \times 7 \times 4 = \_\_\_ \times \_\_\_ \times 7$ $125 \times (8 \times 47) = (125 \times \_\_\_) \times 47$
$25 \times 24 = 25 \times \_\_\_ \times \_\_\_$ $37 + 48 + 23 + 52 = (\_\_\_ + \_\_\_) + (\_\_\_ + \_\_\_)$
$239 \times 16 + 239 \times 4 = 239 \times \_\_\_$ $367 \times 2 + 367 \times 7 + 367 = 367 \times \_\_\_$

答案： 17@@39@@39@@25@@4@@8@@4@@6@@37@@23@@48@@52@@20@@10

2. 口算。
$6000 - 300 =$ $125 \times 80 =$ $132 - (32 + 56) =$
$420 + 480 =$ $1000 \div 200 =$ $57 + 28 + 43 =$
$720 \div 360 =$ $490 + 280 =$ $15 \times 9 \times 4 =$
$9800 - 9000 =$ $68 \times 90 =$ $153 + 99 =$
$580 + 420 =$ $105 \div 3 =$ $1000 - 450 - 550 =$
$960 \div 240 =$ $730 - 423 =$ $360 \div (4 \times 9) =$
$7000 - 2800 =$ $360 + 50 =$ $75 + 98 + 25 =$
$56 \times 300 =$ $6900 - 900 =$ $500 - 34 - 66 =$
$3000 \div 60 =$ $270 \times 20 =$ $25 \times 11 \times 8 =$
$878 + 252 =$ $760 \div 380 =$ $54 + 99 \times 54 =$

答案： 5700@@10000@@44@@900@@5@@128@@2@@770@@540@@800@@6120@@252@@1000@@35@@0@@4@@307@@10@@4200@@410@@198@@16800@@6000@@400@@50@@5400@@2200@@1130@@2@@5400

3. 计算下面各题，能简算的要简算。
$975 - 165 \div 3$ $854 - 199 + 146$ $125 \times 15 \times 6 \times 8$
$4000 \div 125 \div 8$ $285 - (15 + 20) \times 3$ $135 \times 35 - 35 \times 35$
$600 \div 12 \div 5$ $37 + 22 + 63 + 45$ $896 - (496 - 340)$
$54 \times 101 - 54$ $6300 \div 70 \times 90$ $270 \div (16 + 38) \times 29$
$199 \times 34$ $210 \div (7 \times 6)$ $164 \times 36 + 64 \times 164$
$25 \times 32 \times 8 \times 125$ $73 \times 92 + 73 \times 9 - 73$

答案： 920@@801@@90000@@4@@180@@3500@@10@@167@@740@@5400@@8100@@145@@6766@@5@@16400@@800000@@7300