二年级脱式计算500大全说课材料.doc

二年级脱式计算500大全77-46+32 65-38+26 79+19-56 58-36+27 84-27+16= 4+27-1693+23+94 69-(39-23) 99+（25-24）77-76+32 61-38+26 79+19-16 16+77-26 18-36+27 87-27+16 73-23-4 93-(39-23) 71-（25-24）99-46+32 65-39+26 99+99-56 59-36+29 94-29+96 30-(23-29)93-23+94 33-(39-23) 99-（25-24）99-96+32 69-39+26 99+99-96 99-36+29 99-29+96 30-(23+29)23+23+94 93-(39-23) 99-（99-29）55-46+22 65-28+26 58+18-56 58-26+25 84-25+16= 4+25-1682+22+84 68-(28-22) 88+（25-24）55-56+22 61-28+26 58+18-16 18-26+25 85-25+16 20+(22-28)52-22-4 82-(28-22) 51-（25-24）88-46+22 65-28+26 88+88-56 58-26+28 84-28+86 20-(22-28)82-22+84 22-(28-22) 88-（25-24）88-86+22 68-28+26 88+88-86 88-26+28 88-28+86 20-(22+28)22+22+84 82-(28-22) 88+（88-28）77-46+32 63-38+26 79+19-36 38-36+27 84-27+16= 4+27-1693+23+94 69-(39-23) 99+（23-24）77-76+32 61-38+26 79+19-16 18-36+27 87-27+16 30+(23-29)73-23-4 93-(39-23) 71-（23-24）99-46+32 63-39+26 99+99-36 39-36+29 94-29+96 30-(23-29)93-23+94 33-(39-23) 99-（23-24）99-96+32 69-39+26 99+99-96 99-36+29 99-29+96 30-(23+29)23+23+94 93-(39-23) 99-（99-29）33-46+22 63-28+26 38+18-36 38-26+23 84-23+16= 4+23-1682+22+84 68-(28-22) 88+（23-24）33-36+22 61-28+26 38+18-1656+74-26 30+(23-29) 56+94-2636+34-26 96+99-26 16+77-2636+94-26 36+74-26 86+88-2696+99-26 56+84-26 56+54-26 16+55-26