算一算 +=________ | -=________ | 1-=________ | ++=________ | --=________ |
260+402=________ | 185+415=________ | 529-329=________ | 800-346=________ | 402-72=________ |
33×3=________ | 15×4=________ | 12×7=________ | 208×5=________ | 300×6=________. |
算一算 +=________ | -=________ | 1-=________ | ++=________ | --=________ |
260+402=________ | 185+415=________ | 529-329=________ | 800-346=________ | 402-72=________ |
33×3=________ | 15×4=________ | 12×7=________ | 208×5=________ | 300×6=________. |