Wir lernen Mathematik 2 | Teil C
Zehnerzahlen dazu- und wegzählen Individuelle Rechenwege festigen: Addieren und Subtrahieren von Zehnerzahlen 5 + + + + + + + + + + + + = = = = = = = = = = = = 10 10 10 10 20 20 20 20 40 60 30 70 31 32 33 34 15 25 45 75 26 26 26 26 2 + + = = 47 47 1 67 97 + + = = 23 34 53 84 + + = = 39 59 79 79 - - - - - - - - - - - - = = = = = = = = = = = = 20 20 20 20 30 30 30 30 20 60 40 80 51 52 53 54 36 66 96 46 99 99 99 99 4 - - = = 87 87 3 57 37 - - = = 75 56 35 16 - - = = 68 98 28 28 8 18 28 38 88 + + + +. . . + 10 10 10 10 10 5 8 4 1 5 7 6 9 2 3 + + + + + + + + + 10 10 10 10 10 10 10 10 10 93 95 91 97 92 94 99 98 96 - - - - - - - - - 10 10 10 10 10 10 10 10 10 97 97 + + = = 67 27 30 ... 21 -31 - 61 - 81 - 41 - 51 - 91 - 71 97 +87 + 57 + 37 + 77 + 67 + 27 + 47 21 21 - - = = 51 91 30 ... 93 83 73 63 13 - - - -. . . - 10 10 10 10 10 a) b) c)
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