Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
86 − 10 = ______
80 − 10 = ______
21 − 10 = ______
81 + 20 = ______
1 × 10 = ______
65 + 20 = ______
34 − 10 = ______
14 + 20 = ______
67 + 20 = ______
86 + 20 = ______
75 − 10 = ______
51 + 20 = ______
41 + 10 = ______
47 − 10 = ______
7 × 10 = ______
90 − 10 = ______
8 × 10 = ______
5 × 10 = ______
85 − 10 = ______
9 × 10 = ______
