二年级下册万以内加减法口算
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520+490= 620-570= 1170-280=
470+580= 720-590= 580+230=598+204= 357+448= 250+380=1072-353= 560-390= 473+218=276+361=358+587= 743-489=180+250= 530+290= 950-570=450-360= 280+540= 854-180=850-580= 350+160= 840-560=465-396= 602-314= 705-538=523-239= 725-536= 505-356=
801-309≈ 202+196≈ 508+198≈1198-223≈ 959-357≈ 249+123≈1390+653≈ 999-303≈ 401+189≈452+349≈ 942-601≈ 392-182≈301+288≈ 653-381≈ 552+749≈520+490= 620-570= 1170-280=470+580= 720-590= 580+230=598+204= 357+448= 250+380=
1072-353= 560-390= 473+218=
276+361=358+587= 743-489=
180+250= 530+290= 950-570=
450-360= 280+540= 854-180=
850-580= 350+160= 840-560=
465-396= 602-314= 705-538=
523-239= 725-536= 505-356=
801-309≈ 202+196≈ 508+198≈
1198-223≈ 959-357≈ 249+123≈
1390+653≈ 999-303≈ 401+189≈
452+349≈ 942-601≈ 392-182≈
301+288≈ 653-381≈ 552+749≈
520+490= 620-570= 1170-280=
470+580= 720-590= 580+230=
598+204= 357+448= 250+380=
1072-353= 560-390= 473+218=
276+361=358+587= 743-489=
180+250= 530+290= 950-570=
450-360= 280+540= 854-180=
850-580= 350+160= 840-560=
465-396= 602-314= 705-538=
523-239= 725-536= 505-356=
801-309≈ 202+196≈ 508+198≈
1198-223≈ 959-357≈ 249+123≈
1390+653≈ 999-303≈ 401+189≈
452+349≈ 942-601≈ 392-182≈
301+288≈ 653-381≈ 552+749≈
580+250-470 650+590-580
= =
= =
950-570+570 450-360+250
= =
= =
224-130+640 350-180+647
= =
= =
370+160-280 350-160-190 = =
= =
762-314+218 700-557+344
= =
= =
503-239+247 712-536+524
= =
= =
460+280-350 630+290-470
= =
= =
980-570+490 450-360+580
= =
= =
294-130+270 350-180+480
= =
= =
370+160-250 240-160+550 = =
= =
666-354+254 700-538+256
= =
= =
543-239+548 728-536+265
= =
580+250-470 650+590-580
= =
= =
950-570+570 450-360+250
= =
= =
224-130+640 350-180+647
= =
= =
370+160-280 350-160-190 = =
= = 762-314+218 700-557+344
= =
= =
503-239+247 712-536+524
= =
= =
460+280-350 630+290-470
= =
= =
980-570+490 450-360+580
= =
= =
294-130+270 350-180+480
= =
= =
370+160-250 240-160+550
= =
= =
666-354+254 700-538+256
= =
= =
543-239+548 728-536+265
= =
580+250-470 650+590-580
= =
= =
950-570+570 450-360+250
= =
= =
224-130+640 350-180+647
= =
= =
370+160-280 350-160-190
= =
= =
762-314+218 700-557+344
= =
= =
503-239+247 712-536+524
= =
= =
460+280-350 630+290-470
= =
= =
980-570+490 450-360+580
= =
= =
294-130+270 350-180+480
= =
= =
370+160-250 240-160+550
= =
= =
666-354+254 700-538+256
= =
= =
543-239+548 728-536+265
= =