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
28 + 20 = ______
5 × 10 = ______
77 + 20 = ______
61 + 10 = ______
28 − 10 = ______
8 × 10 = ______
37 − 10 = ______
51 − 10 = ______
6 × 10 = ______
86 + 20 = ______
22 + 10 = ______
97 − 10 = ______
67 + 10 = ______
84 − 10 = ______
76 + 10 = ______
88 + 10 = ______
42 − 10 = ______
89 + 20 = ______
14 + 10 = ______
13 + 10 = ______
