六年级上册数学 20 道脱式计算 (能简算的要简算) [1–( + )]÷ 1 4 3 8 1 8 5 1 4 – × ÷3 12 9 5 ( + )÷(1– ) 1 2 1 3 3 8 1 4 1 ÷3+ × 5 3 5 1 2 ÷ ×7 7 3 11 1 5 –( + ) 12 9 12 3 4 1 × – 4 25 50 25÷( – ) 7 8 5 6 3 8 2 + – 4 15 3 ( – )÷( + ) 5 6 3 4 2 3 4 9 [1–( + )]÷3.5 1 4 2 5 3 1 1 + + 8 3 4 [(1– )× ]÷4 3 5 2 3 1 5 1 1 ×[ ÷( + )] 2 6 5 3 12÷(1– ) 3 7 (1– × )÷ 1 6 2 5 7 9 [(1– )× ]÷4 3 5 2 5 8– ÷ × 4 7 2 3 1 6 1 4 2 1 × – ÷ 2 5 3 6 ( – )÷ 5 6 3 4 2 9 1