三年级第二册混合运算题1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6 ÷3/8 –3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)8.7/8+(1/8+1/9)9.9 ×5/6+5/610.3/4×8/9-1/311.7×5/49+3/1412.6×(1/2+2/3)13.8×4/5+8×11/514.31×5/ 6–5/ 615.9/7-(2/7–10/21) 16.5/9×18–14×2/717.4/5×25/16+2/3×3/418.14×8/7–5/6 ×12/1519.17 /32–3/4×9/2420.3×2/9+1/321.5/7×3/25+3/722.3/14××2/3+1/623.1/5×2/3+ 5/624.9/ 22+1/11÷1/225.5/3×11/5+4/326.45×2/3+1/3×1527.7/19+12/19×5/628.1/4+3/4÷ 2/329.8/ 7×21/16+1/230.101×1/5–1/5×2131.50+160÷40(58+370)÷(64-45)32.120-144÷18+3533.347+45×2- 4160÷5234(58+37)÷(64-9×5)35.95÷(64-45)36.178-145÷5×6+42420+580-64×21÷2837.812-700÷(9+31×11) (136+64)×(65-345÷23)38.85+14×(14+208÷26)39.(284+16)×(512-8208÷18)40.120-36×4÷18+3541.( 58+37)÷(64-9×5) 42.(6.8-6.8×0.55)÷8.543.0.12×4.8÷0.12×4.844.(3.2×1.5+2.5) ÷1.6(2)3.2×(1.5+2.5) )÷1.645.6-1.6÷4=5.38+7.85-5.37=46.7.2÷0.8-1.2×5=6-1.19×3-0.43=47.6.5×(4.8-1.2×4)=0.68×1.9+ 0.32×1.948.10.15-10.75×0.4-5.749.5.8×(3.87-0.13)+4.2×3.7450.32.52-(6+9.728÷3.2)×2.551.[(7.1 -5.6)×0.9-1.15]÷2.552.5.4÷[2.6×(3.7-2.9)+0.62]53.12×6÷(12-7.2) -6(4)12×6÷7.2-6 三年级带括号如何教二级混合运算？三年级下卷5234(58+)混合运算题5–1/5×2131.50＋160÷40(58+370)÷(64-45)32.120-144÷18+3533.347+45×2-4160÷ 37)÷(64-9×5)35.95÷(64-45)36.178-145÷5×6+42420+580-64×21÷2837.812-700÷(9+31×11)(136+64)× (65-345÷23)38.85+14×(14+208÷26)39.(284+16)×(512-8208÷18)40.120-36×4÷18+3541.(58+37)÷( 64-9×5) 42.(6.8-6.8×0.55)÷8.543.0.12×4.8÷0.12×4.844.(3.2×1.5+2.5)÷1.6(2) 3.2×(1.5+2.5)÷1.645.6- 1.6÷4=5.38+7.85-5.37=46.7.2÷0.8-1.2×5=6-1.19×3-0.43=47.6.5×(4.8-1.2×4)=0.68×1.9+0.32×1.948.10.15- 10.75×0.4-5.749.5.8×(3.87-0.13)+4.2×3.7450.32.52-(6+9.728÷3.2)×2.551.[(7.1-5.6)×0.9-1.15]÷2.552.5.4÷[2.6×( 3.7-2.9)+0.62]53.12×6÷(12-7.2)-6(4) 12×6÷7.2-6 三年级带括号二如何教学和设计混合计算