a, 24.36-24.(-64)
= 24. [36-(-64)]
= 24.100
= 2400
b, 98.15-49.(-70)
= 49.2.15 - 49.(-70)
= 49.30 - 49.(-70)
= 49.[30-(-70)]
= 49.100
= 4900
a) \(24.36-24.\left(-64\right)\)
\(=24.36+24.64\)
\(=24.\left(36+64\right)\)
\(=24.100\)\(=2400\)
b) \(98.15-49.\left(-70\right)\)
\(=49.2.15+49.70\)
\(=49.30+49.70\)
\(=49.\left(30+70\right)\)
\(=49.100\)\(=4900\)